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Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates

机译:谐波蜂窝状铱酸盐中强磁场下的自旋相关性

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摘要

The complex antiferromagnetic orders observed in the honeycomb iridates are a double-edged sword in the search for a quantum spin-liquid: both attesting that the magnetic interactions provide many of the necessary ingredients, while simultaneously impeding access. Focus has naturally been drawn to the unusual magnetic orders that hint at the underlying spin correlations. However, the study of any particular broken symmetry state generally provides little clue about the possibility of other nearby ground states. Here we use magnetic fields approaching 100 Tesla to reveal the extent of the spin correlations in γ-lithium iridate. We find that a small component of field along the magnetic easy-axis melts long-range order, revealing a bistable, strongly correlated spin state. Far from the usual destruction of antiferromagnetism via spin polarization, the high-field state possesses only a small fraction of the total iridium moment, without evidence for long-range order up to the highest attainable magnetic fields.
机译:蜂窝状铱酸盐中观察到的复杂反铁磁顺序是寻找量子自旋液体的一把双刃剑:两者都证明了磁性相互作用提供了许多必要的成分,同时又阻碍了通行。自然地已经将注意力吸引到暗示潜在自旋相关性的异常磁序。但是,对任何特定的破坏对称状态的研究通常几乎不提供其他附近基态可能性的线索。在这里,我们使用接近100 Tesla的磁场来揭示γ-铱铱酸盐中自旋相关性的程度。我们发现沿磁易轴的一小部分磁场熔化了远距离有序,揭示了一个双稳态,强相关的自旋态。高场态远没有通过自旋极化对反铁磁性的通常破坏,而是仅占总铱矩的一小部分,没有证据表明可以达到最高可达到磁场的远距离有序。

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